Apparatus for the instantaneous heating of liquids



Feb. 25, 1958 ARNAUD 2,825,035

APPARATUS FOR THE INSTANTANEOUS HEATING 0F LIQUIDS Filed April 25, 1956II III United States Patent APPARATUS FOR THE INSTANTANEOUS HEATING OFLIQUIDS Henri Arnaud, Paris, France Application April 23, 1956, SerialNo. 580,091

3 Claims. (Cl. 336-220) This invention relates to apparatus for theinstantaneous heating of liquids, particularly fuel oil, in which thetube through which passes the fuel oil to be heated forms the secondarycoil of a heating transformer. An apparatus of this kind is described inmy prior patent No. 2,616,022, granted October 10, 1952.

It is an object of the invention to provide an apparatus in which thistube can be put in, and removed from, position without it beingnecessary to take the transformer to pieces.

According to the invention, the tube through which the fiuid passes andwhich forms the secondary of the heating transformer is coiled in such amanner as to form open loops so that it can be placed in position aroundthe core of the transformer with only a slight deformation and withoutit being necessary to take the transformer to pieces.

In the accompanying drawings:

Figure 1 is an elevation of a heating transformer pro vided with asecondary coil,

Figure 2 is a perspective view showing the secondary coil alone, and

Figure 3 is a section (to a larger scale) on the line IIIIII of Figure1.

In the embodiment of the invention illustrated in the drawings, aheating transformer has a core 1 which is mounted on a plate 2, forexample, the bottom of a box, by means of gussets 3.

This core carries the primary coil-which is mounted between side plates4 and is covered by a protective sheath 5 (Figure l). The severalconnections 6 of the primary which abut the end cap 7 are designed forthe connection of the electric current supply leads.

The secondary of the transformer is constituted by a portion of tube 8through which flows the fuel oil to be heated. This tube 8 has astraight branch 8a which runs along side a lower bar 1a of the core 1then it is bent into a loop 8b around an upright 1b of the core so as topass above the lower bar In about the middle of it; the tube 8 is thenbent to form an elbow Sc and is then again bent in the form of a secondloop 8d around an upright part 10 of the core in order to terminate in abranch 82 which runs along side the lower bar in. As shown in Figure 2the tube 8 has two open loops 3b and 8d separated by an elbow portion 8cwhich passes close to the ends 8a and 8e of the two loops.

The base plate 2 is provided with a support 9 fixed, for example, bymeans of a screw 9a, for the fixing of the tube 8 by means of a cap 10which is fitted over the elbow 8c and is held in place by a screw 10aand by means of a stirrup 11 which fits over the branches 8a and 8e andis fastened by a screw 11a. The support assembly 9 and the cap stirrupand screws which it carries ensures the secondary circuits are closedelectrically by the connection of the elbow with the branches 8a and 8e.

In order to disassemble the tube 8, it is sufiicient to remove the cap10 and the stirrup 11 and then to take the elbow 80 out of the core ofthe transformer which can easily be done with only a slight deformationof the tube which is made of a malleable material such as a copper basealloy.

The tube 8 can be put in position by the reverse operation withoutdifficulty.

It is of advantage to provide the elbow branches 80 with protectivemuffs 12 (Figure 3).

What I claim is:

1. An apparatus for heating liquids comprising in combination atransformer of the closed core type having branches connected togetherby upright parts; a metallic tube, a portion of which is adapted toconstitute the secondary circuit of said transformer, said portion beingbent into a pair of open loops partially surrounding each of saidupright parts respectively, said loops being separated by an elbowportion passing between said parts and the extremities of said portionpassing along one of said branches close to said elbow portion; andmeans for connecting said extremities with said elbow portion.

2. The combination of claim 1 wherein said means are adapted to securethe tube with respect to the core.

3. The combination of claim 2 wherein said means comprise a supportsecured to said core and bridging means adapted to secure said elbowportion and said extremities to said support.

References Cited in the file of this patent UNITED STATES PATENTS

